CN102927336A - Pilot-operated double-spool split-range adjusting valve - Google Patents
Pilot-operated double-spool split-range adjusting valve Download PDFInfo
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- CN102927336A CN102927336A CN2012104471813A CN201210447181A CN102927336A CN 102927336 A CN102927336 A CN 102927336A CN 2012104471813 A CN2012104471813 A CN 2012104471813A CN 201210447181 A CN201210447181 A CN 201210447181A CN 102927336 A CN102927336 A CN 102927336A
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Abstract
The invention relates to a pilot-operated double-spool split-range adjusting valve which is characterized in that a valve base is arranged in a valve body, a Teflon valve base is arranged on the valve base, a main spool is assembled on the Teflon valve base to form flexible sealing, a valve rod is integrally connected with a pilot-operated spool, and the valve rod and a compression spring are assembled in an inner cavity of the main spool. A first Teflon guide tape is arranged in a trough of the pilot-operated spool, a thrust ring is used for being connected with the main spool, and the sealing surface of the pilot-operated spool is attached to the sealing surface in the inner cavity of the main spool. A noise reduction sleeve and a balancing ring base are sequentially arranged on the valve base. A stuffing assembly is assembled in an upper cover stuffing box, and an upper cover is fixed on the valve body. By adopting the pilot-operated double-spool split-range adjusting valve, a bypass parallel-connection valve is not used for flow adjusting, and accordingly the use quantity of the valves is saved. The pilot-operated spool can meet requirement of equal percentage accurate adjusting under small opening, and the main spool can meet requirement of equal percentage accurate adjusting under large opening and achieve the function of media large flow backflow cutting in the pipeline system failure state. Flow of the pilot-operated double-spool split-range adjusting valve can be adjusted accurately and the pilot-operated double-spool split-range adjusting valve can save pipe distribution space and reduce use cost of clients.
Description
Technical field
The present invention relates to the seperating range control valve of a kind of type pilot, double spool adjusting, valve has the interior little aperture equal percentage fine adjustment of travel range and the equal percentage fine adjustment under the large aperture, simultaneously in the situation that pipe-line system breaks down, can realize the function that the large flow of pipeline internal medium refluxes and cuts off, belong to fluid regulating and controlling valve technology field.
Background technique
The pipeline medium that this valve uses is nitrogen, 40 ℃ of temperature, and upstream pressure is 2.8MPaA during normal operation, and downstream pressure is 0.54 MPaA, and adjusting pressure reduction is 2.26MPa.Valve is when normal operation, and flow need satisfy start-up 400NM
3/ H is adjustable continuously, 30000 NM during smooth running
3/ H is adjustable continuously; When pipe-line system broke down, valve need satisfy maximum capacity of reflux 67500NM
3/ H.According to above operating mode, existing modulating valve can not satisfy its actual requirement, because the normal regulating aperture of existing modulating valve is between 30%～70%, regulating ratio is 30:1, and the dead band is larger; And this pipe diameter is DN300, and the voltage-dropping type telescoping valve of DN300 was installed in the past, owing to the concussion of pipeline, the factor such as wash away, can not realize the fine adjustment requirement of the little aperture flow of start-up.In addition, existing valvular leakage rate is considerably beyond the adjust flux of the desired start-up of operating mode; Simultaneously existing leading type valve only plays the function of the large regulation of little aperture pressure release, with the little regulation of start-up of this working condition requirement with stable system pressure, large regulation, the technical requirements that large flow refluxes during the system failure is not inconsistent.For this reason, we have developed a kind of type pilot double spool seperating range control valve according to the characteristics of this operating mode and control requirement.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency, thereby a kind of type pilot double spool seperating range control valve is provided, it is simple and compact for structure, good sealing effect, and degree of regulation is high, and regulating ratio is large.
According to technological scheme provided by the invention, a kind of type pilot double spool seperating range control valve comprises valve body, valve seat, spool, filler assembly, loam cake and valve rod; Described valve seat is installed in the valve body, at valve seat the tetrafluoro valve seat is installed, main valve plug is assemblied on the tetrafluoro valve seat and forms soft seal, valve rod and guide's spool connect as one, be assemblied in the inner chamber of main valve plug with Compress Spring, the first tetrafluoro guidance tape is arranged in the groove of guide's spool, connects main valve plug with thrust ring, and Compress Spring is positioned in the main valve plug chamber and precompression; Guide's valve core sealed cover and main valve plug chamber inner sealing surface gluing, sealing; Noise reducing sleeve and balance ring seat are installed on the valve seat successively; Filler assembly is assemblied in the loam cake stuffing box; Described loam cake is fixed on the valve body with double-screw bolt, nut.
As a further improvement on the present invention, be provided with the graphite Composition spacer between described valve seat and the valve body, described graphite Composition spacer seals.
As a further improvement on the present invention, place the second tetrafluoro guidance tape, tetrafluoro gimbal and energization spring in the described balance ring seat groove.
As a further improvement on the present invention, be provided with the graphite Composition spacer between described valve body and the balance ring seat.
As a further improvement on the present invention, be provided with the graphite Composition spacer between described loam cake and the balance ring seat.
As a further improvement on the present invention, described main valve plug is provided with two relief holes can realize that guide's spool is opened after, pressure before and after the compensation flap.
As a further improvement on the present invention, has equal percentage type adjustment curve on described guide's spool.
Compared with the prior art the present invention has the following advantages:
1, valve design is simple, and compact structure can both satisfy the Flow-rate adjustment requirement at pipe-line system driving, normal operation, failure phase.Avoid using bypass valve in parallel to carry out Flow-rate adjustment, saved the usage quantity, cost, site space of valve etc., improved user's economic benefit.
2, valve has type pilot, double spool equal percentage minute journey fine adjustment function, guide's spool can satisfy equal percentage fine adjustment under the little aperture, and main valve plug can satisfy under the large aperture equal percentage fine adjustment and can be implemented in medium large flow backflow cutting function under the pipe-line system fault state.
3, under the large aperture of valve under adjustable flow and the little aperture adjustable flow guaranteed that the regulating ratio of valve has reached 80:1, far surpass the regulating ratio of common single-seat adjusting valve or sleeve adjusting valve, have larger adjustable extent.
Description of drawings
Fig. 1 is Standard figure of the present invention.
Fig. 2 is structural representation of the present invention.
Fig. 3 is guide's spool schematic representation of the present invention.
Fig. 4 is main valve plug free-body diagram of the present invention.
Embodiment
The invention will be further described below in conjunction with concrete accompanying drawing.
As shown in Figure 1, 2: type pilot double spool seperating range control valve is made of parts such as valve body 1, graphite Composition spacer 2, valve seat 3, tetrafluoro valve seat 4, noise reducing sleeve 5, Compress Spring 6, guide's spool 7, the first tetrafluoro guidance tape 8, balanced seal ring 9, energization spring 10, filler assembly 11, loam cake 12, graphite Composition spacer 13, valve rod 14, balance ring seat 15, thrust ring 16, graphite Composition spacer 17, the second tetrafluoro guidance tape 18, main valve plugs 19.
Described valve seat 3 is assemblied in valve body 1 inner bottom part, with placing graphite Composition spacer 2 in the middle of the valve body 1, at valve seat 3 assembling tetrafluoro valve seat 4 and noise reducing sleeves 5.Valve rod 14 and guide's spool 7 join beat pin and connect as one after, together be assemblied in together with Compress Spring 6 in the inner chamber of main valve plug 19, guarantee that Compress Spring 6 accurately is positioned in the main valve plug 19, lay the first tetrafluoro guidance tape 8 in the groove of guide's spool 7 after, connect main valve plug 19 with thrust ring 16, Compress Spring 6 precompressed are contractd guarantee the sealing surface applying in guide's spool 7 sealing surfaces and main valve plug 19 inner chambers, form sealing, main valve plug 19 is assemblied on the tetrafluoro valve seat 4 simultaneously, form soft seal, reach the zero leakage standard.Then successively at all the other standard piece such as valve seat assembling noise reducing sleeve 5, balance ring seat 15, balanced seal ring 9, energization spring 10, graphite Composition spacer 17, graphite Composition spacer 13, the second tetrafluoro guidance tape 18, loam cake 12, filler assemblies 11.Place the second tetrafluoro guidance tape 18, tetrafluoro gimbal 9 and energization spring 10 in described balance ring seat 15 grooves.Be provided with graphite Composition spacer 17 between described valve body 1 and the balance ring seat 15.Be provided with graphite Composition spacer 13 between described loam cake 12 and the balance ring seat 15.Filler assembly 11 is assemblied in loam cake 12 stuffing boxes; Described loam cake 12 usefulness double-screw bolts, nut are fixed on the valve body 1.
Working principle of the present invention:
The present invention adopts type pilot double spool minute journey structural type, can realize working as pipe-line system start-up guide spool 7 little aperture equal percentage fine adjustments with stable system pressure, main valve plug 19 large aperture equal percentage fine adjustment functions realize large regulating ratio during normal operation, reach 80:1.Under pipe-line system breaks down state, satisfy medium large flow backflow cutting function simultaneously.
When the pipe-line system start-up, medium high in and low out in the valve, guide's spool 7 is done up and down straight journey motion in main valve plug 19 chambeies, and the equal percentage curve on guide's spool 7 plays regulating action, and the flow fine adjustment that satisfies under the little aperture requires (Fig. 3).Simultaneously, main valve plug 19 is compressed the effect of the power such as the pretightening force F1, medium directed force F 2, F3 of spring 6, makes main valve plug 19 static, and is in the closed position, reaches the zero leakage purpose, thereby do not affect the degree of regulation (Fig. 4) of guide's spool 7.Compress Spring 6 is used in guide's spool 7 bottoms, is comprised of the inconel material, has desirable Young's modulus, has improved guide's spool 7 at response time and the degree of regulation in initial adjustment stage, makes the dead band of valve reach zero.Place the first tetrafluoro guidance tape 8 in guide's spool 7 grooves, have guiding, an effect of reducing friction.
When pipe-line system is normally moved, after guide's spool 7 is covered total travel, continue to drive main valve plug 19 by actuator and carry out large aperture equal percentage fine adjustment.
When pipe-line system was in fault state, medium was from the valve low in and high out, and under actuator's effect, guide's spool 7 is at first done up and down straight journey motion, until standard-sized sheet; Secondly drive main valve plug 19 by thrust ring 16 and do up and down straight journey motion, until main valve plug 19 standard-sized sheets reach large flow backflow purpose.Because of pipeline DN300, valve need use whole negotiabilities of valve just can satisfy 67500NM when large flow refluxes
3The requirement of/H, and the trim negotiability that changes traditional modulating valve also only is about 70% of valve negotiability, so prolonged the adjustment stroke of main valve plug 19, satisfies large flow and refluxes.After two relief holes on the main valve plug 19 can realize that guide's spool 7 is opened, pressure before and after the compensation flap reached the function of quick unlatching main valve plug 19.Valve seat 3 bottom noise reducing sleeves have noise reduction, step-down, reduce the effect of fluid impact, effectively reduce the degradation degree of main valve plug 19 sealing surfaces.Noise reducing sleeve 5 has noise reduction, step-down, decelerating effect, can realize quick-replaceable, maintenance according to the operating mode difference.Place the second tetrafluoro guidance tape 18, tetrafluoro gimbal 9 and energization spring 10 in balance ring seat 15 grooves, can prevent concussion and impact when large flow refluxes, avoid the damage of trim, also play the effect of guiding, less frictional force simultaneously.
The integrated single-seat adjusting valve of the present invention and sleeve adjusting valve function and characteristics formerly have equal percentage type curve adjustment function on the guide valve core 7, solved the 7 uncontrollable restrictions of guide's spool; Main valve plug 19, valve seat 3, noise reducing sleeve 5 are used, and have the characteristics of sleeve adjusting valve, satisfy the applying working condition of large flow, High Pressure Difference.
In the pipeline startup procedure, manifold pressure, the isoparametric fluctuation of temperature are larger, in order to stablize manifold pressure, guarantee that normal flow rate reaches 400NM
3/ H is adjustable continuously, and valve carries out little aperture fine adjustment, namely guide's spool 7 in 20% aperture with the interior equal percentage fine adjustment that carries out; After pipeline driving smooth running, valve requires 30000 NM
3/ H is adjustable continuously, and namely main valve plug 19 carries out the equal percentage fine adjustment in normal aperture (30%-70%), and realizes that regulating ratio is near 80:1.When pipeline loop broke down, valve satisfied large flow and refluxes, and maximum capacity of reflux can reach 67500NM
3/ H.
Claims (7)
1. a type pilot double spool seperating range control valve comprises valve body (1), valve seat (3), filler assembly (11), loam cake (12) and valve rod (14); It is characterized in that: described valve seat (3) is installed in the valve body (1), at valve seat (3) tetrafluoro valve seat (4) is installed, main valve plug (19) is assemblied in the upper formation of tetrafluoro valve seat (4) soft seal, valve rod (14) connects as one with guide's spool (7), be assemblied in the inner chamber of main valve plug (19) with Compress Spring (6), the first tetrafluoro guidance tape (8) is arranged in the groove of guide's spool (7), thrust ring (16) connects main valve plug (19), and Compress Spring (6) is positioned in main valve plug (19) chamber; Guide's spool (7) sealing surface and main valve plug (19) chamber inner sealing surface are fitted; Noise reducing sleeve (5) and balance ring seat (15) are installed on the valve seat (3) successively; Filler assembly (11) is assemblied in loam cake (12) stuffing box; Described loam cake (12) is fixed on the valve body (1).
2. a kind of type pilot double spool seperating range control valve as claimed in claim 1 is characterized in that: described
Be provided with graphite Composition spacer (2) between valve seat (3) and the valve body (1).
3. a kind of type pilot double spool seperating range control valve as claimed in claim 1 is characterized in that: described
Be provided with the second tetrafluoro guidance tape (18), tetrafluoro gimbal (9) and energization spring (10) in balance ring seat (15) groove.
4. a kind of type pilot double spool seperating range control valve as claimed in claim 1 is characterized in that: described
Be provided with graphite Composition spacer (17) between valve body (1) and the balance ring seat (15).
5. a kind of type pilot double spool seperating range control valve as claimed in claim 1 is characterized in that: described
Be provided with graphite Composition spacer (13) between loam cake (12) and the balance ring seat (15).
6. a kind of type pilot double spool seperating range control valve as claimed in claim 1, it is characterized in that: described main valve plug (19) is provided with two relief holes.
7. a kind of type pilot double spool seperating range control valve as claimed in claim 1 is characterized in that: have equal percentage type adjustment curve on described guide's spool (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104471813A CN102927336A (en) | 2012-11-10 | 2012-11-10 | Pilot-operated double-spool split-range adjusting valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104471813A CN102927336A (en) | 2012-11-10 | 2012-11-10 | Pilot-operated double-spool split-range adjusting valve |
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| CN102927336A true CN102927336A (en) | 2013-02-13 |
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| CN2012104471813A Pending CN102927336A (en) | 2012-11-10 | 2012-11-10 | Pilot-operated double-spool split-range adjusting valve |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015110731A1 (en) | 2014-01-21 | 2015-07-30 | Aer | Sealing device, in particular for a valve or a coupling |
| CN108131455A (en) * | 2018-02-12 | 2018-06-08 | 无锡智能自控工程股份有限公司 | High Pressure Difference axial flow control valve |
| CN108150656A (en) * | 2018-02-12 | 2018-06-12 | 无锡智能自控工程股份有限公司 | Type pilot string data adjusts stop valve |
| CN109798368A (en) * | 2019-02-27 | 2019-05-24 | 苏州纽威阀门股份有限公司 | A kind of seperating range control valve |
Citations (9)
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|---|---|---|---|---|
| CN2103051U (en) * | 1991-07-24 | 1992-04-29 | 李景海 | Self-balance clevice for cut-off valve |
| FR2727734A1 (en) * | 1994-12-06 | 1996-06-07 | Control Valves Sarl | Control valve with two flow characteristic, used in industrial and heating purposes |
| FR2792056A1 (en) * | 1999-04-08 | 2000-10-13 | Vanatome | Adjustable flow control valve with double flow properties for high and low flows comprises main valve unit with seat and mobile plunger, and secondary unit called pilot valve |
| CN1336500A (en) * | 2000-07-28 | 2002-02-20 | 株式会社山武 | Single seat valve |
| CN201057279Y (en) * | 2007-05-08 | 2008-05-07 | 施大钟 | Sleeve regulating valve |
| CN101225886A (en) * | 2007-01-17 | 2008-07-23 | 江苏明江阀业有限公司 | Regulating valve special for chlorine |
| CN201391607Y (en) * | 2009-04-22 | 2010-01-27 | 大连亨利测控仪表工程有限公司 | Cage type back-pressure pilot-operated control valve |
| EP2395267A2 (en) * | 2010-06-10 | 2011-12-14 | Control Components, Inc. | Shut-off trim including spring loaded check valve |
| CN202927178U (en) * | 2012-11-10 | 2013-05-08 | 无锡智能自控工程股份有限公司 | Pilot-operated double-valve core split-range control valve |
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2012
- 2012-11-10 CN CN2012104471813A patent/CN102927336A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2103051U (en) * | 1991-07-24 | 1992-04-29 | 李景海 | Self-balance clevice for cut-off valve |
| FR2727734A1 (en) * | 1994-12-06 | 1996-06-07 | Control Valves Sarl | Control valve with two flow characteristic, used in industrial and heating purposes |
| FR2792056A1 (en) * | 1999-04-08 | 2000-10-13 | Vanatome | Adjustable flow control valve with double flow properties for high and low flows comprises main valve unit with seat and mobile plunger, and secondary unit called pilot valve |
| CN1336500A (en) * | 2000-07-28 | 2002-02-20 | 株式会社山武 | Single seat valve |
| CN101225886A (en) * | 2007-01-17 | 2008-07-23 | 江苏明江阀业有限公司 | Regulating valve special for chlorine |
| CN201057279Y (en) * | 2007-05-08 | 2008-05-07 | 施大钟 | Sleeve regulating valve |
| CN201391607Y (en) * | 2009-04-22 | 2010-01-27 | 大连亨利测控仪表工程有限公司 | Cage type back-pressure pilot-operated control valve |
| EP2395267A2 (en) * | 2010-06-10 | 2011-12-14 | Control Components, Inc. | Shut-off trim including spring loaded check valve |
| CN202927178U (en) * | 2012-11-10 | 2013-05-08 | 无锡智能自控工程股份有限公司 | Pilot-operated double-valve core split-range control valve |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015110731A1 (en) | 2014-01-21 | 2015-07-30 | Aer | Sealing device, in particular for a valve or a coupling |
| CN108131455A (en) * | 2018-02-12 | 2018-06-08 | 无锡智能自控工程股份有限公司 | High Pressure Difference axial flow control valve |
| CN108150656A (en) * | 2018-02-12 | 2018-06-12 | 无锡智能自控工程股份有限公司 | Type pilot string data adjusts stop valve |
| CN109798368A (en) * | 2019-02-27 | 2019-05-24 | 苏州纽威阀门股份有限公司 | A kind of seperating range control valve |
| CN109798368B (en) * | 2019-02-27 | 2023-08-29 | 苏州纽威阀门股份有限公司 | Part-way regulating valve |
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Application publication date: 20130213 |